You swung ship and compared the magnetic compass against the gyro compass to find deviation. Gyro error is 2°W. The variation is 8°W. Find the deviation on a magnetic compass heading of 210°.

Correct Answer: Option C — 0.0°

Apply the formula: True = Compass + Deviation + Variation. Given a gyro error of 2°W and variation of 8°W, the deviation is found by comparing the magnetic compass heading to the true heading. At a heading of 210°M, the calculated deviation results in 0.0°.